Product Manual

Directions for Use Introduction 9
AC power
An AC power supply can be purchased to use with the AM282 Audiometer.
Connecting the AC power
1. Ensure the system is turned off while connecting the AC Power.
2. Plug the AC power supply into the power supply receptacle located next to the power
switch on the rear panel.
3. Connect the power cord to the Power Supply brick.
4. Plug the Power cord into the wall socket.
5. Turn the power ON.
When the power supply is plugged into the unit, the power from the batteries will be
switched off automatically to preserve battery life.
Disconnecting the AC power
1. Turn the system OFF.
2. Disconnect the power supply from the wall outlet.
3. Remove the power supply from the rear panel.
Battery operation
The AM282 Audiometer requires 5 x 1.5V AA alkaline batteries. It can also use 5 x 1.2V AA
NiMH or NiCad batteries if rechargeable batteries are desired. The AM282 Audiometer
does not have a built-in charger, rechargeable batteries should be purchased with the
recommended charger for those batteries. Welch Allyn recommends the purchase of
extra rechargeable batteries to ensure a fully charged supple of batteries will be available.
The system was designed to operate for 10 hours on rechargeable batteries. Alkaline
batteries may last longer than 10 hours.
Sleep mode
When using battery power, the AM282 Audiometer will enter a power saving mode (this
is called sleep mode and is indicated by dashes on the LCD display) if the buttons on the
Front Panel have not been pressed for 5 minutes. To exit the sleep mode, press the
Presentation button.
WARNING Use only the Welch Allyn provided power supply. The AM282
Audiometer provided power supply should only be connected to a power source
meeting the following range: 90-246VAC 47-63Hz. In North America, the power
source should be a maximum 120VAC.
Caution Remove the batteries from the AM282 Audiometer if it is not going to
be used for an extended time.